| |
| /* |
| * Copyright (c) 1998, 2001, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * __ieee754_scalb(x, fn) is provide for |
| * passing various standard test suite. One |
| * should use scalbn() instead. |
| */ |
| |
| #include "fdlibm.h" |
| |
| #ifdef _SCALB_INT |
| #ifdef __STDC__ |
| double __ieee754_scalb(double x, int fn) |
| #else |
| double __ieee754_scalb(x,fn) |
| double x; int fn; |
| #endif |
| #else |
| #ifdef __STDC__ |
| double __ieee754_scalb(double x, double fn) |
| #else |
| double __ieee754_scalb(x,fn) |
| double x, fn; |
| #endif |
| #endif |
| { |
| #ifdef _SCALB_INT |
| return scalbn(x,fn); |
| #else |
| if (isnan(x)||isnan(fn)) return x*fn; |
| if (!finite(fn)) { |
| if(fn>0.0) return x*fn; |
| else return x/(-fn); |
| } |
| if (rint(fn)!=fn) return (fn-fn)/(fn-fn); |
| if ( fn > 65000.0) return scalbn(x, 65000); |
| if (-fn > 65000.0) return scalbn(x,-65000); |
| return scalbn(x,(int)fn); |
| #endif |
| } |